Q: Is 21,991 a Prime Number?

 A: Yes, 21,991 is a prime number.

Why is 21,991 a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 21991 can be evenly divided by 1 and 21,991, with no remainder.

Since 21,991 can be divided by just 1 and 21,991, it is a prime number.


More Examples

Number 21,98921,99021,99221,993
Prime? nononono
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

Explore more about the number 21,991:


Ask a Question